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To make LibreSource Synchronizer ignore some files, you have to edit the .ignore.so6 located in the workspace directory. This file contains a sequence of regular expression.

$> echo "titi" > titi.txt
$> so commit -w . "titi"

Start the commit process [ 25 % | | % ] : Detecting local remove Building patch file [ 50 % | / % ] : Inserting local command Connecting to the server [ 75 % | - % ] : Patch local reference [ 100 % | 100 % ] : Finished Commit process finished

*** Report ***

--- A titi.txt ---

Now if i want to ignore titi.txt, i can edit the ~/foo/.ignore.so6 as following :


$> so6 commit -w . "tutu"

Start the commit process [ 25 % | | % ] : Find local remove: titi.txt Building patch file [ 50 % | - % ] : Inserting local command Connecting to the server [ 75 % | % ] : Patch local reference [ 100 % | 100 % ] : Finished Commit process finished

*** Report ***

--- R titi.txt A .ignore.so6 ---

When we commit, file .ignore.so6 has been added and the ignored file "titi.txt" previously committed has been removed. For more explanation about regular expression used in LibreSource Synchronizer see the java.util.regex.Pattern documentation.

  • : match the workspace root directory
  • $ match the end of path expression.
So :bin$ match the bin directory in workspace root.
  • . match any character.
  • .* match any character zero or more times.
  • .*~ match any filename finishing by ~.

Example :

.*DS Store

This ignore file is used by all workspace connection. You can have a different ignore file for each workspace connection. For example for the workspace connection 1, you can have a <wsroot>/.so6/1/.ignore.so6 file similar to the <wsroot>/.ignore.so6 file. Both ignore files are took into account for ignoring.

This feature allows you to make some filtering in the dataflow.

Quick regex reference :

Construct Matches
x The character x
\\ The backslash character
0nThe character with octal value 0n (0 <= n <= 7)
0nn The character with octal value 0nn (0 <= n <= 7)
0mnn The character with octal value 0mnn (0 <= m <= 3, 0 <= n <= 7)
xhh The character with hexadecimal value 0xhh
uhhhh The character with hexadecimal value 0xhhhh
t The tab character ('u0009')
n The newline (line feed) character ('u000A')
r The carriage-return character ('u000D')
f The form-feed character ('u000C')
a The alert (bell) character ('u0007')
e The escape character ('u001B')
cx The control character corresponding to x
Character classes
[abc]a, b, or c (simple class)
[^abc] Any character except a, b, or c (negation)
[a-zA-Z] a through z or A through Z, inclusive (range)
[a-d[m-p]] a through d, or m through p: [a-dm-p] (union)
[a-z&&[def]] d, e, or f (intersection)
[a-z&&[^bc]]a through z, except for b and c: [ad-z] (subtraction)
[a-z&&[^m-p]]a through z, and not m through p: [a-lq-z](subtraction)
Predefined character classes
. Any character (may or may not match line terminators)
d A digit: [0-9]
D A non-digit: [^0-9]
s A whitespace character: [ tnx0Bfr]
SA non-whitespace character: [^s]
w A word character: [a-zA-Z_0-9]
W A non-word character: [^w]
POSIX character classes (US-ASCII only)
p{Lower} A lower-case alphabetic character: [a-z]
p{Upper}An upper-case alphabetic character:[A-Z]
p{ASCII} All ASCII:[x00-x7F]
p{Alpha} An alphabetic character:[p{Lower}p{Upper}]
p{Digit} A decimal digit: [0-9]
p{Alnum} An alphanumeric character:[p{Alpha}p{Digit}]
p{Punct}Punctuation: One of !"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~
p{Graph} A visible character: [p{Alnum}p{Punct}]
p{Print}A printable character: [p{Graph}]
p{Blank} A space or a tab: [ t]
p{Cntrl} A control character: [x00-x1Fx7F]
p{XDigit} A hexadecimal digit: [0-9a-fA-F]
p{Space} A whitespace character: [ tnx0Bfr]
Classes for Unicode blocks and categories
p{InGreek} A character in the Greek block (simple block)
p{Lu} An uppercase letter (simple category)
p{Sc} A currency symbol
P{InGreek} Any character except one in the Greek block (negation)
[p{L}&&[^p{Lu}]] Any letter except an uppercase letter (subtraction)
Boundary matchers
^ The beginning of a line
$The end of a line
b A word boundary
B A non-word boundary
AThe beginning of the input
G The end of the previous match
Z The end of the input but for the final terminator, if any
z The end of the input
Greedy quantifiers
X?X, once or not at all
X* X, zero or more times
X+ X, one or more times
X{n} X, exactly n times
X{n,}X, at least n times
X{n,m} X, at least n but not more than m times
Reluctant quantifiers
X?? X, once or not at all
X*?X, zero or more times
X+? X, one or more times
X{n}?X, exactly n times
X{n,}? X, at least n times
X{n,m}? X, at least n but not more than m times
Possessive quantifiers
X?+ X, once or not at all
X*+X, zero or more times
X++ X, one or more times
X{n}+X, exactly n times
X{n,}+ X, at least n times
X{n,m}+ X, at least n but not more than m times
Logical operators
XY X followed by Y
X|YEither X or Y
(X) X, as a capturing group
Back references
n Whatever the nth capturing group matched
Nothing, but quotes the following character
Q Nothing, but quotes all characters until E
E Nothing, but ends quoting started by Q
Special constructs (non-capturing)
(?:X)X, as a non-capturing group
(?idmsux-idmsux) Nothing, but turns match flags on - off
(?idmsux-idmsux:X) X, as a non-capturing group with the given flags on - off
(?=X) X, via zero-width positive lookahead
(?!X) X, via zero-width negative lookahead
(?<=X) X, via zero-width positive lookbehind
(?X) X, via zero-width negative lookbehind
(?>X) X, as an independent, non-capturing group

Backslashes, escapes, and quoting

The backslash character ('') serves to introduce escaped constructs, as defined in the table above, as well as to quote characters that otherwise would be interpreted as unescaped constructs. Thus the expression \\ matches a single backslash and { matches a left brace.

It is an error to use a backslash prior to any alphabetic character that does not denote an escaped construct; these are reserved for future extensions to the regular-expression language. A backslash may be used prior to a non-alphabetic character regardless of whether that character is part of an unescaped construct.

Backslashes within string literals in Java source code are interpreted as required by the Java Language Specification as either Unicode escapes or other character escapes. It is therefore necessary to double backslashes in string literals that represent regular expressions to protect them from interpretation by the Java bytecode compiler. The string literal "b", for example, matches a single backspace character when interpreted as a regular expression, while "\\b" matches a word boundary. The string literal "(hello)" is illegal and leads to a compile-time error; in order to match the string (hello) the string literal "\\(hello\\)"

must be used.

Character Classes

Character classes may appear within other character classes, and may be composed by the union operator (implicit) and the intersection operator (&&). The union operator denotes a class that contains every character that is in at least one of its operand classes. The intersection operator denotes a class that contains every character that is in both of its operand classes.

The precedence of character-class operators is as follows, from highest to lowest:

1 Literal escape x
2 Grouping [...]
3 Range a-z
4 Union [a-e][i-u]
5 Intersection [a-z&&[aeiou]]

Note that a different set of metacharacters are in effect inside a character class than outside a character class. For instance, the regular expression . loses its special meaning inside a character class, while the expression - becomes a range forming metacharacter.

Line terminators

A line terminator is a one- or two-character sequence that marks the end of a line of the input character sequence. The following are recognized as line terminators:

  • A newline (line feed) character ('n'),

  • A carriage-return character followed immediately by a newline character ("rn"),

  • A standalone carriage-return character ('r'),

  • A next-line character ('u0085'),

  • A line-separator character ('u2028'), or

  • A paragraph-separator character ('u2029).

If UNIX_LINES mode is activated, then the only line terminators recognized are newline characters.

The regular expression . matches any character except a line terminator unless the DOTALL flag is specified.

By default, the regular expressions ^ and $ ignore line terminators and only match at the beginning and the end, respectively, of the entire input sequence. If MULTILINE mode is activated then ^ matches at the beginning of input and after any line terminator except at the end of input. When in MULTILINE mode $

matches just before a line terminator or the end of the input sequence.

Groups and capturing

Capturing groups are numbered by counting their opening parentheses from left to right. In the expression ((A)(B(C))), for example, there are four such groups:

1 ((A)(B(C)))
2 (A)
3 (B(C))
4 (C)

Group zero always stands for the entire expression.

Capturing groups are so named because, during a match, each subsequence of the input sequence that matches such a group is saved. The captured subsequence may be used later in the expression, via a back reference, and may also be retrieved from the matcher once the match operation is complete.

The captured input associated with a group is always the subsequence that the group most recently matched. If a group is evaluated a second time because of quantification then its previously-captured value, if any, will be retained if the second evaluation fails. Matching the string "aba" against the expression (a(b)?)+, for example, leaves group two set to "b". All captured input is discarded at the beginning of each match.

Groups beginning with (? are pure, non-capturing groups that do not capture text and do not count towards the group total.

Last edited by Root at Mar 25, 2007 12:00 AM - Edit content - View source